Braking mechanism for railway car trucks



Marh ,23, 1939- H. A. MOELLER ET AL 2,152,268

BRAKING lvxRClLIANIsls/x FOR RAILWAY CAR TRUCKS I Filed May e, 193'? l 4 Sheets-sheet `ll s Lo l fr. Q C

l im l c4 a H c N I R RR 6* 6\ N S *4 7.14. Mae/Aer,

Lai

Mai'ch 28, 1939.

H. A. Mol-:LLER ET AL BRAKING MECHANISM FOR RAILWAY CAR TRUCKS Filed May 6, 1937' 4 Sheets-Sheet 2 JYA. Moe/kf',

6T L. Uff.,

www

March 28, 1939. A, MOELLER ET AL 21,152,268

BRAKING MECHANISM FOR RAILWAY CAR TRUCKS Filed May 6, 1937 4 Sheets-Sheet 3 [2. A. Mae///3 Y v 6,: Uffa.

March 28, 1939. H A, MOELLER ET AL 2,152,268

BRAKING MECHANI'SM FOR RAILWAY` CAR TRUCKS Filed May 6, 1937 A4 Sheets-Sherril 4 ln/UWM, E. Mae//e f',

' L Orr,

Patented Mar. 28, 1939 UNITED STATES PATENT OFFICE BRAKIG LIECHANISM FOR RAILWAY CAR TRUCKS Application May 6, 1937, Serial N0.`141,156

16 Claims.

This invention relates to improvements in brake operating mechanismfor railway car trucks, and more particularly to improvements in mechanism of thetype actuated by one or more pistons.

Heretofore the air cylinder or cylinders for the piston or pistons were mounted on the body of the car. Recently, however, due to higher train speeds and extremely heavy equipment, the older method of transmitting through pull rods the forces for the application of brakes to the wheels of a truck fromv an air cylinder mounted on the body of the vehicle, has been improved by providing air cylinders mounted on the truck. Such improvement is,v exemplified in the application of Stertzbach and Moeller Serial No. 100,169, filed September 10, 1936. The means disclosed in that application reduces Weight by eliminating long pull rods and heavy body lever arrangements, and consequently, such ymeans may be maintained at less expense and has greater economy and enciency than the former means of mounting brake cylinders.

In accordance with the present invention, the cylinder is so mounted as to be spring supported, and this is accomplished by mounting the cylin-l der directly on a spring-supported, transverse bolster of the truck or partially on the bolster and partiallyon a side frame ,of the truck. Due to this arrangement the cylinder is positioned outside of the side framensystem where it may be readily reached for any purpose.

For a clear understanding of our invention and to illustrate certain forms of the same, reference is had to the accompanying drawings, in Which Fig. 1 is a side elevation of one end portion of a railway car truck showing an embodiment of our invention in whichthe carrier for the air cylinder is supported partially by the side frame and partially by the transverse bolster;

Fig. 2 is a top plan view.

Fig. 3 is a sectional View of a detail taken on the line 3,-3 of Fig. 1.

Fig. 4 is a view similar to Fig. 1 but showing a modification in which the carrier is mounted directly on the transverse bolster.

Fig. 5 is a top plan view of the same.

Fig. 6 is a side elevation of another modication in which the carrier is mounted directly on 50 the transverse bolster.

Fig. 7 is an end view of the structure shown in Fig. 5. l

The improvementsdisclosed herein may be employed with braking mechanism of the type shown in said Stertzbach and Moeller applical (Cl. 18S- 33) tion. The latter involves mounting one brake cylinder between the side frame systems and on the center bolster system. In Vour present construction, instead of one brake cylinder on each truck, We show the cylinder mounting on the outside o-f thekside frame system. With the brake cylinder mounted outside of the side frame, at least two cylinders are required foreach truck and preferably both cylinders mounted on one end of the truck. 'I'he end on which the cylinders are mounted is designated as the flive end and the other, as the dead end. If both ends are each equipped with twoV cylinders, then both ends would be designated as live ends.

Referring to Figs. 1 to 3 inclusive, 8 designates a portion of a side frame of a six-Wheel truck having a conventional opening 9 to receive one of the transverse bolsters l0 which is shown in dotted lines in Fig. 2. Ill indicates one of the Wheels on which the side frame is mounted.

In accordance with the present invention a carrier I2 has one of its ends pivotallyA connected*l by a slot and pin joint I3, to a bracket'lll which may be integral with or secured to the side frame. The opposite end of the carrier is pivotally connected at l5 to a bracket I6 that is designed to be mounted on the transverse bolster. l0. As the bolster is supported by springs, it is obvious that one end of the carrier can move upwardly and downwardly with the bolster.

An air cylinder Il is supported by the carrier, and its piston rod is pivotally connected at I8 to a lever I9 which fulcrums at 20 on one end of av link 2| that is pivotally secured at 22 to the carrier. `A rod 23 has one of its ends pivotally connected at 24 to the medial portion of the lever and its opposite end pivotally connected at 25 to a portion 26 of the brake mechanism.

The Weight of the lever I9, link 2| and rod 23 must be supported by some means other than the piston rod 2l. This support is provided by a split carrier block arrangement 28 (see Fig. 3) consisting of van upper section 28a and lower section 28o; the former being retained by the bolt I5 and the latter by a pocket 28e in the bracket I6. The rod passes through recesses 28d in such sections, and rests on the section 2817. The carrier block is split for the purpose of assembling the various parts. Y I

'I'he arrangement shown operates the brakeon one side of the truck. The brake on the other side of the truck is operated by a similar arrangement-opposite and on the same end of the truck.

Y It will be obvious that when the piston rod moves outwardly, jthe lever I9 will fulcrum at 20 and* pull the rod 23 for the purpose of applying the brakes.

In the modification shown in Figs. 4 and 5, the carrier 30 is mounted directly on one end of the bolster 3| and is secured in position by any suitable means such as bolts 32.

The air cylinder 33 is mounted on the carrier, and the piston rod 3l!l is pivotally connectedat 35 to a lever 36-that is fulcrumed' at 31' on the outer end of a link 38. The latter is pivotally connected at 39 to the carrier. The brake operating rod 40 slides between rollers 4I. mounted in the carrier, and of course, the rod is pivotally connected at one end to the lever and is pivotally connected at its opposite endtol a part of the brake mechanism 42.

In Figs. 6 and 7, the link is replaced by an arm` which is integral with the carrier 5|; the latter being directly mounted on one end of the transverse bolster 52. The cylinder 53'- inA this instance, is also mounted, onthe carrier, and the piston rod 54- actuates the lever 55r which effects movement of the brake operating rod 55. Since in this arrangement the lever `55 issupported by an arm which is rigidly united with` the carrier, it is not necessary to further guide or support the pull rod 56.

The three arrangements describedv above have the brake cylinder mounted wholly or partially on theend of the transverse bolster order to realize the advantage ofl having the cylinder springsupported.

The drawings` show the improved mechanism applied to a six-wheel truck, but it is manifest that suchmechanism is applicable tov trucks of any number ofwheels.

While we have disclosed what we now consider to be preferredembodiments of. the invention, it is apparent that changes mayV be made in the details disclosed without, departing from the spirit of theV invention as expressed in the claims.

What weV claimand desire to securev by Letters Patent is: p Y

1. A railway car truck including aside frame member and a transverse bolster, an air cylinder mounted on an end of said bolster and having a piston rod, andbrakey actuating mechanism operatively connected tothe piston rod.

2. A railway car truck including a side frame member and a transverse bolster, an air cylinder supportedat least partially byv said bolster andhaving a piston rod, and' brake actuating mechanism operatively connected toy the piston rod, said cylinder being arranged outwardly of theV side frame member.

3. Arailway car truck comprising a side frame member and a transverse bolster, a carrier supported inpart at least by said bolster, an air cylinder supported by the carrier and having a piston rod, and brake operating mechanism operatively connected to the piston rod.`

4. A railway car truck comprising a side frame member and a transverse bolster, a carrier supported in part at least by the bolster, an air cylinder mounted on the carrier and having a piston rod, a lever having one of its ends. pivotally connected to the piston rod,` means pivotally connecting the opposite end of the lever to said carrier, and a brake-operating rodpivotally connected to the medial portion of the lever.

5; A railway car truck comprising a side frame member and a transverse` bolster, a carrier supported in part at least by the bolster, an airV cylinder mounted on the carrier and having' a piston rod, a lever having one of its Yends pivotally connected to the piston rod, means pivotally connecting the opposite end of the lever to said carrier, a brake-operating rod pivotally connected to the medial portion of the lever, and means forming a. support for said rod.

6. A railway car truck comprising -a side frame member and a transverse bolster, a carrier arranged at one side of the side frame member and supported at least partially by saidbolster, an air cylinder mounted on the carrier and having a piston rod, a lever actuated by said rod, and a. brakefoperating. member operatively connected to. and actuated b-y the lever.

7. In a railway car truck, a side frame member, a transverse bolster, an air cylinder supported in part at least by saidbolster and having a piston rod, a lever operatively connected to said rod, and a brakeactuating rod slidably supported by the bolster vand operatively connected to said lever.

8. The combination with a railway truck, side frame member and transverse bolster, of a carrier operatively connected toV said member and bolster and supported in part by the latter, an air cylinder mounted on the carrier and having. a piston rod, and brake-operating mechanism operatively connected to said piston rod.

9. The combination with a railway car truck side frame member and transverse bolster, of a carrier having one of its ends pivotally connected to. the side frame member and its other end pivotally connected to the bolster,y an air cylinder supported by the carrier and having a piston rod, and brake-actuating mechanism operatively connected to said piston rod.

10. I'he combination with a railway car truck side frame member and transverse bolster, of a carrier having one. of itsends pivotally connected to the side frame member and its other end pivotally connected to the bolster, an air cylinder supported by the carrier and having a piston rod, brake-actuating mechanism operatively connected to said piston rod, said brake-actuating. mechanism comprising a pivotally mounted lever having one. of its ends connected tov the piston rod, and a brake actuating rod pivotally connected to said lever.

11. In combination with a railway truck side frame member and transverse bolster, of a carrier having one of its ends pivotally supported by the side frame member and its other end pivotally supported by the bolster, an air cylinder mounted on the carrier and having a piston rod, a lever having one of its ends pivotally connected to the. piston rod, means pivotally connecting the other end of the lever to the carrier, and a brake-operating rod pivotally connected to the medial portion of the lever.

12. The combination with a railway truck side frame and transverse bolster, of an air cylinder mounted on one end of the bolster and having a piston rod, a lever having one of its ends pivotally connect-ed to the piston rod, means operatively connecting the other end of the lever to the bolster, and a rod slidably mounted between the cylinder and bolster and having one of its ends pivotally connected to the medial portion of the lever.

13. 'I'he combination with a railway truck side frame member and transverse bolster, of a carrier mounted on one end of the bolster, an air cylinder supported by the carrier. and having a piston rod, a lever pivotally connected to the piston rod, means operatively and pivotally connecting the lever to the bolster, a support carried by the carrier, and a brake-operating rod guided by said support and having one of its ends pivotally connected to said lever.

14. In combination with a railway truck side frame member and a transverse bolster, of a carrier supported by the bolster and having a projecting arm, an air cylinder mounted on said carrier and having a piston rod, a lever pivotally cylinder supported in part at least by one endA of the bolster and arranged outwardly of the side frame member, a lever having one of its ends pivotally and operatively connected to said bolster, a piston rod projecting from the cylinder and operatively connected to the other end of the lever, and a brake-actuating rod operatively connected to the medial portion of the lever.

16. The combination with a railway truck side frame member and transverse bolster, of a carrier mounted on one end of the-bolster, an air cylinder supported by the carrier and having a piston rod, a lever pivotally connected to the piston rod, means operatively and pivotally connecting the lever to the bolster, a roller support carried by the carrier, and a brake-operating rod guided by said roller support and having one of its ends pivotally connected to s aid lever.

HARRY A. MoEnLER.' CLAUDE L. oRR. 

